Usborne solve it yourself

Professor Pott unravels the meaning of an ancient curse after discovering a golden statue. The reader must solve picture puzzles in order to solve the mystery.

Twenty photos hold the clues to discovering who is being held as a prisoner at Potcullis Castle.

Who Stole the Black Diamond? That's the question on everyone's lips and the list of suspects is a long one. Following the death of 119-year-old billionaire collector 'Mr. Diamond (real name Count Lukki), one of his most prized possessions - the multi-million dollar 'Black Diamond' - is reported missing. It's up to you to find out who stole it and where it is now. But be careful. There are some fiendish villains who are after all the precious gems they can lay their hands on.

Readers follow a trail of clues on each page in an attempt to find Professor Potts, who is missing. Includes helpful hints and answers at the back of the book.